1. Igneous Rocks Rocks & Minerals Notes: Page 7

2. Vocabulary 30) Igneous Rock: Rocks formed by the solidification of magma 31) Solidification: when some becomes as solid from a liquid 32) Magma: Molten (melted rock) 33) Intrusive rocks: Rocks which form inside a volcano 34) Extrusive: Rocks which form outside of the volcano. 35) Texture: How something feels 36) Course: Large crystals causing a rough texture 37) Fine: Small crystals causing smooth texture. 38) Mafic: Igneous rocks which contain Fe and Mg 39) Felsic: Igneous rocks which contain Al

3. How are igneous rocks formed?

4. Name two places where igneous rocks form

6. How is crystal size determined?

10. What’s the difference between extrusive and intrusive igneous rocks?

11. form on or near the surface (small crystals) form below the surface (large crystals)

12. Characteristics used to classify igneous rocks

20. contains Fe and Mg contains Al

22. Key Identifying Features of Igneous Rocks

23. usually black in color the grains have been melted and are now physically connected

24. Please Answer the Questions on Page 8 Using Your Earth Science Reference Tables.

26. The Answers (Page 8): 1. Basaltic Glass 2. Granite 3. Basalt